make username->uid test work when no login is set
make username->uid test work when no login is set

Nordstrom/mixlib-shellout,juliandunn/mixlib-shellout,docwhat/mixlib-shellout,docwhat/mixlib-shellout,juliandunn/mixlib-shellout,BackSlasher/mixlib-shellout,BackSlasher/mixlib-shellout,chef/mixlib-shellout,chef/mixlib-shellout